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To avoid the effect of subject factor, the sample students who were drawn from the population were randomly selected. To determine who was in experimental
group or control group were also randomly selected. A pretest was also administered to both experimental group and control group.
It was conducted before the treatment. Its purpose was to find the initial variances between the experimental group and control group. At the end of the sessions, a
posttest was given to both experimental group and control group. To avoid the history effect, the back ground of English capability of the
sample students was also identified. Based on the identification, none of the sample students had superiority in English ability. All of the sample students were at the
same level. Their English knowledge was just obtained from formal study.
3.1. 2 The Setting and Samples of Study
The study setting was a Senior High School in Serui. It is located in Serui town. It is in Kepulauan Yapen Regencies one of regencies in Papua Province. The
population of the research was students in the eleventh class of science program. It consisted of five classes. They were science program one, two, three, four, and five.
All of the classes had the same chances to become sample students. However, two of them should be determined as sample students. To get the sample students a
lottery was given to the five classes. Two of them were randomly selected to become as sample students of the study using clustering sampling. When the sample students
had been determined, a lottery was administered again to determine who would be
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experimental group and control group. One piece of the lottery was written on it experimental group and another piece was not written at all. Those who took the a
lottery written experimental group on it become group experiment and those took the blank one became group control.
From the lottery given, finally, the eleventh class of science program 1 was randomly selected became group experiment and the eleventh class of science
program 3 became group control. Unfortunately, the two groups had equal number in the quantity, that is, thirty one students each.
3.2 The Variables of Study
Based on the title of the thesis, there are two kinds of variables in it. The interactive listening is as independent variable which was manipulated to give the
effect on the dependent variable. The dependent variable is student’s listening ability which was observed and measured to determine of the effect of the independent
variable, Farhady: 1982. Based on the variables observed and measured, this research has got three dependent variables: if the interactive listening is effective to
develop the student’s listening ability, what makes interactive listening able to develop student’s listening ability, and what provokes the student’s involvement.
3. 3 The Teacher
